Two former Parramatta Eels players are accused of harbouring semi-automatic weapons and possessing more than half-a-million dollars in cash after dramatic arrests in Sydney's Centennial Park yesterday.

Johnson wants inquiry into Buswell issue

Former West Australian police minister Rob Johnson says fallen treasurer Troy Buswell should quit politics, and has called for an inquiry to investigate the extent of a cover-up of his driving offences.

Mr Buswell was fined $3100 and disqualified from driving for one year over 11 traffic offences committed after attending a wedding in February in which he crashed into four parked cars and a telephone pole.

Mr Johnson, who has long been a thorn in the side of Premier Colin Barnett after he was axed as police minister and snubbed for the parliamentary speaker position, says Mr Buswell has overstepped the boundary with this latest indiscretion.

"He should do the honourable thing that many people in parliament have done when they have transgressed and broken the law - he should resign," Mr Johnson told AAP on Thursday.

It beggars belief that questions were not asked by the premier and other superiors, he said.

"There's no doubt there's been an attempt at a cover-up," he said.

The outspoken backbencher called for an inquiry into the matter but said he would not be the one to raise the issue in parliament next week when Mr Buswell was expected to return.